public bool Edit(Class editClass)
{
string sql = "UPDATE " + TBL_CLASSES + " SET "
+ CLASS_NAME + "='" + editClass.name + "' "
+ "WHERE " + CLASS_ID + "=" + editClass.id + ";";
return _db.ExecuteInsertUpdateDelete(sql);
}
public bool Add(Class newClass)
{
string sql = "INSERT INTO " + TBL_CLASSES
+ " (" + CLASS_NAME + ") "
+ "VALUES ('" + newClass.name + "');";
return _db.ExecuteInsertUpdateDelete(sql);
}
public Student(long id, String name, double grade, int height, Class class_id)
{
this._id = id;
this._name = name;
this._grade = grade;
this._height = height;
this._class_id = class_id;
}
public bool Delete(Class editClass)
{
string sql = "DELETE FROM " + TBL_CLASSES
+ " WHERE " + CLASS_ID + "=" + editClass.id + ";";
return _db.ExecuteInsertUpdateDelete(sql);
}
public List<Student> GetStudentsInClass(Class fromClass)
{
List<Student> studentsList = new List<Student>();
String sql = "SELECT * FROM " + TBL_STUDENTS
+ " WHERE " + CLASS_ID + "=" + fromClass.id + ";";
DataTableReader records = _db.ExecuteSelect(sql);
while (records.Read())
{
studentsList.Add(new Student(
Convert.ToInt32(records[STUD_ID]),
(String)records[STUD_NAME],
Convert.ToDouble(records[STUD_GRADE]),
Convert.ToInt32(records[STUD_HEIGHT]),
fromClass
));
}
records.Close();
return studentsList;
}
